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A judge warned of the "disastrous effects" of drugs as he sentenced a Lancashire teenager who stabbed his father to death and attacked his mother. Jordan Ryan, 19, from Blackburn, was suffering from paranoid schizophrenia when he fatally knifed Neil Ryan, 46, as he slept in bed at the family home.

The youngster's use of cannabis and Mephedrone had "contributed" to his mental illness, along with his playing of violent video games, Preston Crown Court heard. His mother Debbie, 41, survived the bedroom attack as she escaped with two superficial wounds and was in court to support her son.

Ryan was made subject of an indefinite hospital order after he pleaded guillty to manslaughter on the grounds of diminished responsibility. Sentencing, Judge Anthony Russell QC said it was "one of the saddest cases" he had presided over in his 6-and-a-half years at the court.

It appears that your symptoms became apparent after you had been smoking cannabis and taking bubble (Mephedrone).Anyone who thinks drugs are harmless should reflect upon the disastrous effects on you. The viewing of violent video games and videos have also been partially to blame, exacerbating the underlying illness.